Fix properties binding to SpringApplication

Fix ConfigFileApplicationListener to correctly bind
`application.properties` to SpringApplication. Binding in RC2 failed
due to the fact that `ConfigurationPropertySources` did not extend
`EnumerablePropertySource`.

Fixes gh-346

spring-boot/src/main/java/org/springframework/boot/context/config/ConfigFileApplicationListener.java

@@ -44,6 +44,7 @@ import org.springframework.core.Ordered;
 import org.springframework.core.convert.ConversionService;
 import org.springframework.core.convert.support.DefaultConversionService;
 import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.EnumerablePropertySource;
 import org.springframework.core.env.Environment;
 import org.springframework.core.env.MutablePropertySources;
 import org.springframework.core.env.PropertySource;
@@ -386,15 +387,26 @@ public class ConfigFileApplicationListener implements
 	 * Holds the configuration {@link PropertySource}s as they are loaded can relocate
 	 * them once configuration classes have been processed.
 	 */
-	static class ConfigurationPropertySources extends PropertySource<Object> {
+	static class ConfigurationPropertySources extends
+			EnumerablePropertySource<Collection<PropertySource<?>>> {
 
 		private static final String NAME = "applicationConfigurationProperties";
 
 		private final Collection<PropertySource<?>> sources;
 
+		private final String[] names;
+
 		public ConfigurationPropertySources(Collection<PropertySource<?>> sources) {
-			super(NAME);
+			super(NAME, sources);
 			this.sources = sources;
+			List<String> names = new ArrayList<String>();
+			for (PropertySource<?> source : sources) {
+				if (source instanceof EnumerablePropertySource) {
+					names.addAll(Arrays.asList(((EnumerablePropertySource<?>) source)
+							.getPropertyNames()));
+				}
+			}
+			this.names = names.toArray(new String[names.size()]);
 		}
 
 		@Override
@@ -418,6 +430,11 @@ public class ConfigFileApplicationListener implements
 			}
 		}
 
+		@Override
+		public String[] getPropertyNames() {
+			return this.names;
+		}
+
 	}
 
 }

spring-boot/src/test/java/org/springframework/boot/context/config/ConfigFileApplicationListenerTests.java

@@ -16,6 +16,7 @@
 
 package org.springframework.boot.context.config;
 
+import java.lang.reflect.Field;
 import java.util.Arrays;
 
 import org.hamcrest.Description;
@@ -26,7 +27,6 @@ import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.ExpectedException;
 import org.springframework.boot.SpringApplication;
-import org.springframework.boot.context.config.ConfigFileApplicationListener;
 import org.springframework.boot.context.config.ConfigFileApplicationListener.ConfigurationPropertySources;
 import org.springframework.boot.context.event.ApplicationEnvironmentPreparedEvent;
 import org.springframework.boot.test.EnvironmentTestUtils;
@@ -38,6 +38,7 @@ import org.springframework.core.env.ConfigurableEnvironment;
 import org.springframework.core.env.MutablePropertySources;
 import org.springframework.core.env.SimpleCommandLinePropertySource;
 import org.springframework.core.env.StandardEnvironment;
+import org.springframework.util.ReflectionUtils;
 
 import static org.hamcrest.Matchers.contains;
 import static org.hamcrest.Matchers.equalTo;
@@ -352,6 +353,17 @@ public class ConfigFileApplicationListenerTests {
 		assertThat(property, equalTo("baz"));
 	}
 
+	@Test
+	public void bindsToSpringApplication() throws Exception {
+		// gh-346
+		this.initializer.setSearchNames("bindtoapplication");
+		this.initializer.onApplicationEvent(this.event);
+		SpringApplication application = this.event.getSpringApplication();
+		Field field = ReflectionUtils.findField(SpringApplication.class, "showBanner");
+		field.setAccessible(true);
+		assertThat((Boolean) field.get(application), equalTo(false));
+	}
+
 	private static Matcher<? super ConfigurableEnvironment> containsProperySource(
 			final String sourceName) {
 		return new TypeSafeDiagnosingMatcher<ConfigurableEnvironment>() {

spring-boot/src/test/resources/bindtoapplication.properties

@@ -0,0 +1 @@
+spring.main.show_banner=false